Humic substances amended soils

Boyd, S.A. and Sommers, L.E., Humic and fulvic acid fractions from sewage sludges and sludge amended soils, in Humic Substances in Soil and Crop Sciences, Clapp, C.E., Malcolm, R.L., and Bloom, P.R., Eds., American Society of Agronomy, Inc. USA, 1990, pp. 203-220. 

THE EFFECT OF ORGANIC MATTER AMENDMENT ON NATIVE SOIL HUMIC SUBSTANCES... 

Compositional and Structural Features of Humic Substances in Amended Soils 151... 

COMPOSITIONAL AND STRUCTURAL FEATURES OF HUMIC SUBSTANCES IN AMENDED SOILS... 

Figure 4.3. Gel permeation chromatograms of humic acids isolated from a soil either unamended (A) or amended with 25tha 1yr 1 of cattle manure for 4 years (B) and 25, 50, and 100tha 1yr 1 of sewage sludge for 4 years (C, D, and E, respectively). Reprinted from Piccolo, A., Zaccheo, E, and Genevini, P. G. (1992). Chemical characterization of humic substances extracted from organic-waste-amended soils. Bioresource Technol. 40, 275-282, with permission from Elsevier.

Brunetti, G, Senesi, N., and Plaza, C. (2007a). Effects of amendment with treated and untreated olive oil mill wastewaters on soil properties, soil humic substances and wheat yield. Geoderma 138,144-152. 

Piccolo, A., Zaccheo, P., and Genevini, P. G. (1992). Chemical characterization of humic substances extracted from organic-waste-amended soils. Bioresource Technol. 40, 275-282. 

Plaza, C., Hernandez, D., Fernandez, J. M., and Polo, A. (2006a). Long-term effects of amendment with liquid swine manure on proton binding behavior of soil humic substances. Chemosphere 65,1321-1329. 

Senesi, N., Miano, T. M., and Brunetti, G. (1996). Humic-like substances in organic amendments and effects on native soil humic substances. In Humic Substances in Terrestrial Ecosystems, Piccolo, A., ed., Elsevier, New York, pp. 531-593. 

Clapp, C. E., and M. H. B. Hayes. 1999. Characterization of humic substances isolated from clay- and silt-sized fractions of a com residue-amended agriculture soil. Soil Science 164, no. 12 899-913. 

Fernandez, J. M., C. Plaza, N. Senesi, and A. Polo. 2007. Acid-hase properties of humic substances from composted and thermally-dried sewage sludges and amended soils as determined hy potentiometric titration and the NICA-Donnan model. Chemosphere 69, no. 4 630-635. doi 10.1016/j.chemosphere.2007.02.063. 

Compost is rich in humic substances [25] and beneficial microorganisms [26]. The addition of compost to soil affects disease incidence by means of antagonistic mechanisms [27]. Biological control, based on competition, antibiosis, hyperparasitism and induced systemic resistance in the host plant, have been described for compost-amended substrates [28]. Compost improves the number and functions of nitrogen fixers and vesicular-arbuscular mycorrhizae [29], which have positive effects on the physical properties of soil [30] and improves the organic matter content, contrasting soil desertification [31]. 

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